Fix #2366, bug when disabled gb28181.

AUTHORS.txt

@@ -73,7 +73,7 @@ CONTRIBUTORS ordered by first contribution.
 * liulichuan<liulichuan@kuaishou.com>
 * yapingcat<caoyapingneu@163.com>
 * chenchengbin<chenchengbin@yy.com>
-* chenhaibo<chenhaibo@RD-CHB-0476-01>
+* chenhaibo<nmgchenhaibo@foxmail.com>
 * jasongwq<jasongwq@gmail.com>
 * xialixin<xialixin@kanzhun.com>
 * yinjiaoyuan<yinjiaoyuan@163.com>

trunk/src/app/srs_app_rtmp_conn.cpp

@@ -961,12 +961,14 @@ srs_error_t SrsRtmpConn::acquire_publish(SrsLiveSource* source)
     
     SrsRequest* req = info->req;
 	
-	// @see https://github.com/ossrs/srs/issues/2364
+    // @see https://github.com/ossrs/srs/issues/2364
     // Check whether GB28181 stream is busy.
 #if defined(SRS_GB28181)
-    SrsGb28181RtmpMuxer* gb28181 = _srs_gb28181->fetch_rtmpmuxer(req->stream);
-    if (gb28181 != NULL) {
-        return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "gb28181 stream %s busy", req->get_stream_url().c_str());
+    if (_srs_gb28181 != NULL) {
+        SrsGb28181RtmpMuxer* gb28181 = _srs_gb28181->fetch_rtmpmuxer(req->stream);
+        if (gb28181 != NULL) {
+            return srs_error_new(ERROR_SYSTEM_STREAM_BUSY, "gb28181 stream %s busy", req->get_stream_url().c_str());
+        }
     }
 #endif